A Promise to Keep

"Where's Lucy? What have you done to her?" "Why don't you ask her yourself?" After the disappearance of Vesper, Lucy was no where to be found. Fairy Tail was devastated at the loss of their celestial mage, but one mage holds hope that he'll find her. Sequel to S-Class but can be standalone. Rated M for language, mature content and I'm paranoid because there is no higher rating.